C07C 273/1872
Preparation of compounds comprising a -n-c-n-c-n- moiety
Official title: {Preparation of compounds comprising a -N-C(O)-N-C(O)-N- moiety}
C07C273/1872 (Preparation of compounds comprising a -n-c-n-c-n- moiety) appears on 27 US grants and 9 published applications in this corpus.
Search patents in C07C- Granted patents
- 27
- Published applications
- 9
- Assignees
- 18
- Inventors
- 85
- Latest grant
- 8 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 4 | 2 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process for producing urea and biuret8 Oct 2024US 12,110,264 B2Casale SA
- Method for converting monoisocyanates to ureas17 Sep 2024US 12,091,377 B2Dow Global Technologies LLC
- Method for removing monoisocyanates from organic solution27 Aug 2024US 12,071,394 B2Dow Global Technologies LLC
- Process for producing biuret from urea9 Jul 2024US 12,030,837 B2Casale SA
- Method for preparing biuret polyisocyanate11 Jul 2017US 9,701,624 B2Wanhua Chemical Group Co., Ltd.
- Process to produce a melt of urea and biuret and system to produce such a melt2 Jul 2026US 2026/0184674 A1Yara International Asa
- Iodine labeled hydrogels and precursors thereof with improved properties7 Mar 2024US 2024/0076266 A1Boston Scientific Scimed, Inc.
- Process for producing urea and biuret8 Feb 2024US 2024/0043375 A1Casale SA
- Process for producing biuret from urea12 Oct 2023US 2023/0322660 A1Casale SA
- Method for converting monoisocyanates to ureas6 Jan 2022US 2022/0002237 A1Dow Global Technologies LLC
Most cited
By later US patents
- Process for the partial carbodiimidization of organic isocyanates76US 4,088,665 ABayer Aktiengesellschaft · 1978
- Process for the production of water-soluble or water-dispersible blocked polyisocyanates43US 4,098,933 ABayer Aktiengesellschaft · 1978
- Process for the production of polyisocyanates with a biuret structure27US 3,976,622 ABayer Aktiengesellschaft · 1976
- Preparation of biuret polyisocyanates19US 4,051,165 ABayer Aktiengesellschaft · 1977
- Preparation of biuret-containing polyisocyanates10US 5,641,851 ABASF SE · 1997